More than five years after going public with its radical hybrid-electric high-speed business jet concept, developer HyperMach Aerospace is finalizing design of a subscale flight demonstrator and, through sister company SonicBlue, is building parts for the first engine. Pivotal to the Mach 5 aircraft, dubbed the HyperStar, is development of an innovative hybrid propulsion system that combines superconducting electrical power with an advanced gas turbine. The combined system is designed to ...


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